On Tue, 29 May 2012, Christoph Lameter wrote:

quoted

 	 * unlikely to succeed so close to the limit, and we fall back
 	 * to regular pages anyway in case of failure.
 	 */
-	if (nr_pages == 1 && ret)
+	if (nr_pages <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER) && ret) {

Should this not be

	 nr_pages <= 1 << PAGE_ALLOC_COSTLY_ORDER

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